ok, back from work now and able to try and address some of the posts:
the breakfast issue is a tricky one.
he used to have to leave the house quite early (7/7.15) and often didnt feel hungry then (I take Bonsoir's point that this could be because of eating quite late the previous evening so he was still full) and if he did eat would then feel sick, so became reluctant to eat anything. I did used to send him out instead with a couple of slices of peanut butter on toast which he used to like. He now leaves home later so has more time & so I have spoken to him this evening and suggested he tries to have some toast or cereal in the mornings from now on. We've agreed that I'm going to phone him in the mornings to remind him - because I'm not with him during the week I'm obviously not there to make it for him.
I've not mentioned weight to him in this respect, only that its good to eat first thing (I have tied this in to the fact I am eating breakfast atm due to being away through work and staying in a hotel) and have said to him that i find eating helps my concentration etc, and that I'm less hungry later in the day. He seems keen on this so is going to try and eat something, time and hunger permitting.
Clearly once I am home with him in the mornings again in 2 months time it will be easier to make sure he eats breakfast or takes something out with him. In the meantime, we will see how the above works.
Moving on, have taken on board the comments re lunch.
To explain, the reason I have let him take money to school for lunch was twofold. Firstly, when he was having a packed lunch in primary, he often wouldnt eat it, so would go all day without food. there was no alternative then, so it wasnt the case he was buying sweets/snacks etc. he just didnt eat. Secondly, when he started at the school it was clear very few children bring in packed lunches, not least because if they do, they have to carry around all day (there are no lockers etc at his school) DS only has one friend who has a packed lunch, which is due to the fact he is a vegan which the school dont cater for.
in terms of what DS eats at school, I dont know for certain. I have said it is probably not healthy. its not crisps or sweets though as the school dont sell them. I asked what he had for lunch today and he said curry and a bread roll...
I'll be honest and say at the moment I'm unsure what to do on the lunch point. Obviously at present I cant start him having packed lunches without his dad's co-operation (which is not guaranteed) I would prefer for DS to choose healthy food to eat at school. that may be over-optimistic.
I should add that DS does not live on a diet made entirely of junk food and snacks. He does eat a variety of foods. He eats most
vegetables (although he's not keen on salad veg, excepting cucumber) and fruit. He likes pasta, rice, baked potatoes (no butter, he doesnt like it) etc. he is not a child who eats a limited diet. the reality i think is that he probably does eat too large portions even of 'good' food. the suggestion of smaller plates is one I am definitely going to follow up, this will help me to gauge how much food I am giving him at mealtimes. I know that DS will eat whatever is on his plate, and more. If we can start off with a smaller plate, and then no seconds, I would hope this will help. I will also try and get into the habit of cooking just enough rather than too much, so there aren't seconds or thirds to be had.
moving on, in terms of exercise, as mentioned DS plays sport (football and basketball) at present 3-4 times a week ALREADY. I know there were a few comments about going for a half hour walk with him at the weekend. this was of course in addition to the sports he already does, and more about me starting to participate in some exercise with him. he is also keen to try out for rugby, and we are hopefully going along this coming weekend to a local club.
He has expressed interest in martial arts and kickboxing in the past. The problem has been either that classes have clashed with his other activities, or been at times when either I or his dad are at work. I will look into this again though to see if any of the times are more workable now.
Just picking up on a point about afterschool clubs etc, DS does football and basketball after school, plus 2 'academic' clubs. the clubs only last until 4.30 or so though, meaning DS is still home on his own for at least an hour. That is the time when I know he will be hungry, and snack on whatever comes to hand first.
Finally, DS is, and always has been very popular at school. he is bright but into football etc so is friends with the sporty kids and the clever ones. all his teachers comment positively on his attitude, how well he gets on with others, and his kindness. As a result has had little hassle from other children. that is another reason why i want to try and sort this out before he does get picked on or hassled.